
Overview
The ASAIR AF2603R20 digital force transmitter conditions the small bridge signals from compatible force sensors and load cells, providing a local TFT readout and industrial signal interfaces. It combines amplification, linear correction and compensation with two-point or five-point calibration for weighing and force-monitoring systems.
Features
- 0.4–20 mV/V input sensitivity for compatible Wheatstone-bridge sensors.
- 24-bit acquisition ADC with local display and button configuration.
- RS485/Modbus communication, with baud rates up to 115200.
- Voltage and current output formats for integration with industrial control equipment.
- Two-point and five-point calibration; adjustable gain up to 128×.
- Compact aluminum housing with front-panel IP65 protection.
Specifications
| Brand / model | ASAIR / AF2603R20 |
|---|---|
| Function | Wheatstone-bridge force/load-cell signal conditioning and digital display |
| Compatible input sensitivity | 0.4–20 mV/V |
| Power supply | 10–30 VDC |
| ADC / display | 24-bit ADC / TFT display |
| Accuracy | 0.02% |
| Acquisition rate | Up to 1000 Hz |
| Output update rate | 10 updates per second |
| Digital communication | RS485, Modbus; baud rate up to 115200 |
| Analog output formats | 0–5 V or 0–10 V; 0–20 mA or 4–20 mA, depending on configuration |
| Calibration / gain | Two-point or five-point; gain up to 128× |
| Operating temperature | −20 to +60 °C |
| Operating humidity | 20–80% RH, non-condensing |
| Ingress protection | IP65 at the front panel only |
| Housing / size | Aluminum alloy / 108 × 72 × 28 mm |
| Unspecified drawing tolerance | ±0.1 mm |
The acquisition rate and output update rate describe different stages: up to 1000 Hz acquisition does not mean 1000 output updates per second. Match the required analog output format, sensor sensitivity, excitation and wiring before integration. The listed analog formats are configuration-dependent and are not a promise that every format is available simultaneously.
Applications
- Industrial batching, filling and online checkweighing.
- Materials testing, force measurement and machinery load monitoring.
- Energy, transportation, food-processing and pharmaceutical production monitoring.
- Remote industrial measurement using compatible current/voltage and RS485 interfaces.
Application photographs illustrate complete installations; the transmitter is one component of the measurement system.
Configuration and Installation
Connect a compatible bridge sensor and 10–30 VDC supply using the correct terminal assignments. Confirm excitation requirements before connection, select the matching signal format and set the Modbus address and baud rate. Calibrate the complete sensor and transmitter assembly with suitable reference loads.
| Signal | Displays voltage |
|---|---|
| Weigh | Displays weight percentage |
| Gain | Gain setting, up to 128× |
| Baud | RS485 baud-rate setting, up to 115200 |
| Addr | Device address |
| CAL | Calibration-method selection |
The front drawing identifies the switch, display and control buttons. Keep terminal areas protected from moisture; the front-panel IP65 rating does not cover an exposed installation as a whole.
What's Included
- 1 × ASAIR AF2603R20 digital force transmitter.
Force sensors, load cells, power supply, host adapters, reference weights and application machinery are not included.
Visual Details








